Tandem-spring friction draft-rigging.



No. 847,769. PATENTED MAR. 19, 1907.

E. w. HARTOUGH.

- TANDEMSPRING FRICTION DRAFT RIGGING. APPLIOATAION FILED DEC. 29. 1905.

3 SHEETS-SHEET 2.

59 1. nates the draft-s lls of a" car, which are covered j 'bya decking 2 and silent against an endsill 3.

' To all whom it may concern.-

UNI-TED sTA rissY PATENT orsios.

' EDWARD w. HARTOUGH, or THAYER, Mrs-sonar.

TANDEM-SPRING FRICTION DRAFT-RIGGING.

' Be it known that I, EDWARD HARTQ (men, a citizen of the United States, residing at Thayer, in the county of Oregon and State. of Missouri, have invented certain new and useful Improvements in Tandem S ring Friction Draft-Rigging, of which the f lowin isaspecification.

y invention relates to improvements in tandemspring friction draft-rigging for cars and my. object is to provide a rigging wherein the draft-springs cooperate in resistingboth com ression and tractive strairs.

.' improved draft-rigging secured to. the :under side of a car. Fig; Zi's an inverted plan view thereof. Fig. 3 is an erlargedvertlcal longif" "tudinal section of the draftrigging proper in its normal position. Fig. 4 is a perspective.

. view of same. Figs. 5 and 6 are detail .per-

spective views of alocp and yoke'employ'ed".

and the'spread'epblocks.

in carrying out the invention.- Fig. 7 is a detail perspective view of a front follower-plate; and a plunger forming part of the invention.v

Figs. '8 and 9 are slightly enlarged. detail pers ective views of chafing-irons and spreaderb ocksforming part ofthe invention. Fi 10 is a detail perspectivevie'w of a rear fo -r tower-plate; Fig. 11 is adetail erspective' view of a drum for inclo'sin the c afing-iron ig. .12 is'a detail perspective view of a rin employed in carrying out the invention.

I 1 L3 is a crcss-section taken on line XIII-X I'Of Fig. 3'.With' the draft-arms added'theret o." Fig. 14 is a vertical longitudinal -se(. tion,of a modified form of the .draft-riggingiunder "compressive" endin 17. is a.

strain. Figx15'is a transverse section of the 1 6' is a detail perspective view. of the spreaderblocks 'forming art of said'f modifiedeform, detail of one of thespl'eaderbl i ' Referring now' to jsaid-idravpjings. 1- desig 4 designates the dead wood, and 5 the siding,

of the car.

Specification of Letters Patent. v Application filed December 29, 1905. Serial No- 298.729.

hereinafter described. V

Patented March 19, 1907 6 designatesa pair of metallic draft-arms sultably secured to the draft-sills and provided at their under sides with o' pcsitely-.

disposed ocke ts 7, the ends of'w 10h form front-an rear'stops 8 and-9, respectively. The upper sides of said pockets are closed by flanges 10, which act as'guid'es for the upper surface of a forward follower-plate 1 1 and a" rear follower-plate 12. Said follower-plates 1-1 and 12 norinallybear against stops. 8 and 9, res ectlvely. Followerplate 1.2. is provided Wit a semicircular rear er.d.l3, adapted to fit snugly withinthe, semicircular rear end of a loop 14', loosely embracing the top and bottom sides of both follower-plates, and prov ded at itsforward-erd with a centrally-disosed o ening 15. The front surface'of fol-.-

ower-p ate 12 is provided with a centrally- Q disposed circular recess 12? for a purpose lfi'designates ayoke embracing the for- 16 and a stud 17, which latter rojects forwardly through opening 15 an .enters the;

ward end of the loop and provided with slots rear portion of a draw-bar 18, thereby' holding'saidrear portion, loop '14 and the rear end of the yoke in horizontal alinement.

by. means: of a snugly-fitting 'draft key- 19,

.;The yoke is further secured to the draw-bar which extends through said drawbar, slots 1.6" and elongated slots 6? in the forward portion of the draft arms,. .and is held-from longitudinal movement by cotter-pins 19..

The forward portion of the draw bar is'snpported by a hollow key 20,extending through the depending ends of a yoke 21-, and held 1n pin 23. Draw-bar 18 is rovided at itsn per forward portion withj ecustomary, ash-"i board-18?, adapted-to contact with deadwood'e, and "thus limit the back ward move-j .ment of 'said:.-draw-bar. Yoke 2 1'is secured .to the :forward ends of the. draft-arms, the J I surface of saidzdraftkarinsl The front-follower-piate is provided with a p v V upper side's OftWhiChzIatter-are' recessed forv ame, taken on line'XVlXV- of Figi'fl i. F ig'.

rqi lwnrd ly-projecting phinger, consisting of a stem an a""conical hea' end of. 'stem;j24'}lieing{screwed1 into the fel lower plate sothat it {flay be removed therefrom, should it-becorne broken'jor too badly 'worn'forffurther use. ,Head 25"fits within" 25,- the forward iqs 9 fpOSitlOn byfan. integral head 22 and a cottera pocket 26, formed withina pluralityof spreader-blocks 27 of segmental form in cross-section, so that their adjacent sides will fit together when said spreader-blocks occupy their normal position. The rear wall of pocke t'26 is conical to snugly embrace head 25, and also to enlarge and strengthen the rear portions of the spreader-blocks, as said portions are subjected to the greatest strain when the rigging is either under compressive or tractive force. The forward portions of the spreader-blocks are also enlarged at 27 to give them additional strength, while their forward .ends are provided with flanges 28 for a purpose hereinafter described.

Each spreader-block is provided at its outer surface with a longitudinal groove 29 for the reception of longitudinal ribs 30 inte ral with the inner side of chafin -irons 31, W ich latter, like the spreader-b ocks, are segmental in cross-section, so that their adjacent sides will abut when said chafing-irons occupy their normal position, By thus providing the interlocking ribs and grooves the chafingupon the latter. I

vided at their rear ends with flanges 32, held in contact with the front surface of followerirons will be held in proper telescopic relation with the spreader-blocks and cannot turn The chafing-irons are proplate 12 by-nieans of a helical draft-spring 33 embracing the chafing-irons and abutting at its opposite ends against flanges 32 and a ring 34, which latter is held by the spring in contact with the rear side of flanges 28, said springs-normally holding the parts in the position shownin Fig. 3.

Ring 3 substantially fills the space between the ends. of the" chafing-irons and flanges 28, and thus prevents the front end of. spring '33 from getting caught between said parts while theyare undergoing telescopic action. The interior diameter of ring ,34 is large enough to admit the forward ends \of the chafing-irons when the latter are spread apart as hereinafter described, and said spring is held'from lateral movement by means of a drum 35 loosely embracing said ring, flang'es28 and 32, and spring 33.

The rear end of drum35 is open, so that the parts inclosed in said drum may be readily inserted or removed therefrom when necessary, and in order that said open end may successfully resist the internal pressure to close which it is subjected by spring 33 when the rigging is under either tractive or compressive strain I provide an annular recess 36 in the front side of plate 12, in which said open end snugly fi'ts. This arrangement also reliably holds-the drum inaxial alinement with the plungfg The forward end of the drum'i's 38.- thro'u h which stem 24 extends. T 39' design-ates a double-coil draft-spring embracing stem 24 and abuttingat its opa head 37, having a. centrarjaperture posite ends against head 37 and the rear side'of follower-plate 11, said spring being interposed between the head and the plate sition shown in Fig. 3. Spring 39 is stronger drum in contact with the rear follower-plate.

Loop 14 and the parts carried thereby are held in position between the draft-arms by means of transverse straps 40, secured to the under sides of the draft-arms by bolts 41. By removing said straps, draft-key 19, and the hollow key 20 it is obvious that the drawbar, the yoke, the loop, and the parts carried thereby may be'readily removed from the draft-arms.

The draft-springs and the dashboard 1'8. are so spaced that when the plunger has fully expanded and pushed the spreader-blocks to the rear oftheir backward movement further backward movement of said plunger will be in order to normally-hold them in the poarrested by the complete compression of the rings and the dashboard contacting with place simultaneously with the complete compression of the springs and thus prevent the plunger from becoming bent.-

'Recess 12 permits the spreader-blocks to move to the end oftheir backward movement without contacting with the rear follower-plate. V

After the rigging has been relieved of compressive or tractive force spring 39 releases the. plunger from the grip of the spreaderblocks, and all of the parts are returned to 'their normal position ly said spring \md spring 33.

The operation of the draft-rigging under compressive force is substantially as follows: Backward movement of the draw-bar, yoke 16, and the loop forces the forward followerplate backwardly, and therel y compresses spring 39 between said moving plate and head 37 of the drum, which latter is held from backward movement ly the rear follower-plate abutting against stops 9. As

ICC

the front follower-plate moves backwardly it of course will carry the plunger therewith,

so that'the conical head25, acting on the conical end of the pocket 26, will force the "spreader-block 27 both backwarllly and apart, so that they in turn will force the chafing-irons apart against the spring 33, thus expanding the latter diametrically until it frictionally engages both the drum and the chafing-irons. As the plunger continues tomove backwardly it will carry the spreaderblocks therewith, the flanges of which latter in turn move ring 34 backwardly, and thus compress spring 33 between said moving ring and flanges 32, which latter are held from backward movement by the rear follower-plate. This operation creates frictional resistance between the telescoping spring 39. v

spreader-blocks and chafing-irons, the chaf-' ing-irons and spring 33, and between said spring and the interior surface of the drum.

The action of the ri ging under tractive force is as follows: When the draw-bar is pulled ohtwardly, it of course carries yoke -16'and loop. 14 therewith, while the plunger and the forward follower-plate remain stationary, said follower-plate being held from conical head 25, and thus force sai blocks The spreading of the blocks will" apart. force the chafing-irons apart, which in turn force spring 33 into frictional contact with -the interior of the drumQ From the above description it is apparentthat the frictional devices and the two draft springs 33 39 cooperate in resisting both the tractive and compressive strains *and. by their united action offer an effective though limited yielding resistance to said-strains. Referring now to'themodified form illustrated by Figs. 14, 15, 16, and "17, 14 designates a loop provided at its forward end with an opening 15 for the reception of a stud 1T projecting from the rear ends of a yoke 16*,

embracing the forward end of said loop. 1 1' ,and 13 designate front and rear followerplates, respectively, embraced by the loop.

The forward follower-plate is provided with a rearwardly-projecting plunger, consisting of a stein 24 screwed into said follower-plate, and

arear terminal having a conical head'25? fiting within a pocket '26, formed by spreaderblocks 27, having integral flanges 28 at.

their forward ends; The forward ends of the spreader-blocks are normally held in cont-act with the head 37 of a drum by means of a helical draft-spring 33, embracing said spreader-blocks and bearing, at its opposite .ends, against the rear follower-plate and. flanges 28 Head 37 -is provided with acentrally-disposed opening, through which. stem 24 extends, and'the rear terminal of the drum is held in a recess 36 in the rear folterposed between ther'drumhead and thelower-plate by a double draft-spring 39, in-

front follower-plate. The construction and operationof this modified form of draft-rigging is similar to the preferred form, except that chafing-irons 31 and ring 34 are omitted. Consequently when the rigging isunder com.- pressive'foroe spring 33 will vbe compressed between the rear follower-plate and flanges 283. This construction also permits a reduction in the size of spring 33, drum 35, and the loop 14.

Having thus described my invention, what Tclaim, and desire'to secure by Letters Patent, isv 11. In a draft-rigging, a drum, friction members ,movably arranged thereinand having frictional engagement with each other, and a draft-spring encircling the friction members and adapted to be forced thereby into frictional engagement with the drum.

2. In a draft-rigging, a drum, friction members movably arranged therein and having frictional engagement with each other,

chafing-irons embracing the friction members and adapted to be expanded thereby, and a draft-spring encircling the chafing-irons and adapted to beforced thereby into'frictio'nal engagement with the drum. I 3. In a.'draft-rigging, a plunger, spreaderblocks frictional'ly engaging the same, a drafts ring encircling the spreader-blocks, and a ment therewith by the spreader-blocks.

4. In a. tandem-spring friction draft-rigging, a drum, friction members movably arranged therein and having frictional engage- .rum inclosingthe draft-spring so that the latter may be forced into frictional engagement with each'other, a draft-spring encirwith the drum, another draft-springwhich abuts against the forward end of the drum, and means which cooperate with the drum and the friction members in simultaneously compressing the draft-springs .either'under compressive e'i tractive force.

5. In a tandem-spring friction d f g ging, a drum, friction members movably ar-" y cling the friction members and adapted to be I forced thereby into frictional engagement ranged thereinand having frictional engagement with each other, chafing-irons telescopically embracing the friction members and adapted to be expanded thereby, a draftspring encircling the chafing-irons and adapt-.- ed to be enforced thereby into frictional-engagement with the drum, another draft-spring whichabuts against the forward end of the drum, and means which cooperate with the drum and the chafing-irons in simultaneously compressing the draft-springs either under compressive. or tractiVe force p I 6. In a draft-rigging, a front follower-plate arranged to move backwardly and forwardly,

means for moving said plate backwardly a limited distance, stops for limiting 'theforward movement of said plate, a pluhgerproecting rearwardly from said plate, spreader locks forming a pocket in which the rear end,

of said plungeris arranged, said plunger being adapted to spreadsaid... blocks apart and move them backwardly therewith a, portion of its stroke, a-drum inclosing the blocks and ro-vided with a closed enda ainst which the-- forward terminals of said locks "normallv the spreading action and backward move-- ment of the latter by frictionally engaging throughout its length the exterior of the blocks and the interior-of the drum.

7. In a draft-rigging, a plunger arranged for limiting the backward movement of said plunger, spreader-blocks forming a pocket in which the rear end of said plunger is arranged, said plunger being adapted to spread the blocks apart and move them backwardly therewith a ortion of its stroke, a drum in-' closing the b ocks and providedwith a closed end for limiting the forward movementof the blocks, a rear follower-plate against which said drum :abuts, and resilient means interposed between said drum and the blocks for resisting both the spreadin action and the rearward movement'of the atter.

8. In a draft-rigging,'a plunger arranged to move backwardly andforwardly, means for limiting the backward movement of said plunger, spreader-blocks forming a pocket in which the rear end .of said plunger is arranged, said plunger being adapted to spread the blocks apart and move them backwardly therewith a portion of its stroke, a drum inclosing said blocks and adapted to limit their forward movement, a rear follower-plate provided with a recess for the; reception of the rear ends of the blocks, an annular groove for the receptionof the rear end of the drum,

and a helical spring'interposed between the .drum and the blocks for resisting boththe spreading action and backward movement of the latter by frictionallyengaging, throughout itsl'ength, the exterior of theblocks andthe interior of the drum.

- .9. In adraft-rigging, spreader-blocks forming a pocket and arranged tomove backwardly and forwardly, a plunger having one end arranged in the pocket so thatsaid blocks Will be spread apart thereby when they move 'to move backwardly'and forwardly, means forwardly, a rear follower-plate arranged tomove backwardly and forwardly, stops for limiting the backward movement of said plate, a drum inclosin'g the blocks and abut= ting against the plate so that it will move forwardly with the-lat'ter,-and resilient means in terposed between the plate, the drum, and the blocks for moving the latterforjvardly and retarding said movement and the spreading action of the blocks by frictionally engaging the exterior of the latter and the interior of the drum.

10. In a tandem-spring frictibn'draft-rigging, spreader-blocks forming a pocket and arranged to move backwardly and forwardly,

a plunger having one end arranged in the pocket so that said blocks will be spread apart thereby when they 'movef0rwardly,a

-' rear follower-plate arranged to move back- Wardly and forwardly, stops for limiting the backward movement of said plate, a drum inclosing the blocks and abutting against the plate sothat it will move forwardly with the latter, a helical spring interposed between the drum and the blocks for resisting both the wardly and forwardly, a plunger having one end arranged in the pocket so that said blocks will be spread apart thereby-when they moveforwardly, a rear follower-plate arranged to move backwardly and forwardly,

stops for limiting the backward movement of said plate, a loop fornioving the plate forwardly, a drum inclosing the blocks and abutting gainst the plate so that it will move for ardly with the latter, and resilient means interposed between the plate, the drum, and the blocks for moving the latter forwardly and retarding said'movement and the spreading action of blocks by frictionally engaging the exterior of the latter and the interior of the drum.

12. In'a draft-riggin a front followerplate arranged to move ackwardly and forwardly, a yoke for moving said plate backwardly a limited distance, stops for limiting the forward movement of said plate, a plunger projecting rearwardly from said plate, spreader-bloc is forming a pocket in which the rear end of said plunger is arranged, said plunger being adapted to spread said blocks apart and move them backwardly therewith a portion of its stroke, and resilient means for resisting both the spreading action and the backward movement of said blocks. r

13. In a tandem-spring friction draft-riggin ,afront'follower-plate'arran ed to move bac wardly and forwardly, a p unger promove them backwardly therewitha portion of its stroke, a drum inclosing the blocks and rovided with a closedend against which the orward terminals of said blocks normallya'but, a rearfollower-platearranged to move backwardlyand forwardly, said plate abutting'at its forward side against the rear end of the drum, a helical spring embracing the blocks to resist their spreading action and thus indirectly resist the backward movement of the front follower-plate and the forward movement of the rear follower]')late, and a draft-spring interposed between the front follower-plate and the forward-end of thedrum to cooperate with the helical snring in resisting said movements of thekl'followerplates. l l l 14. In a draft-rigging, a plunger arranged to move longitudinally, spreader-blocks forming a pocket in which the rear end of into frictional contact, throughout its length,

with both the drum and said chafing-plates, when the draft-rigging is under either tractsive or compressive force.

15. In a draft-rigging, a plunger arranged to move longitudinal y, spreader e blocks forming a pocket in which the rear end of said plunger is arranged, said plunger being adapted to spread said blocks apart and move them backwardly therewith a portion of its stroke, a follower-plate, chafing-irons embracing the spreader-blocks and arranged to telescope thereon, flanges integral with the rear ends of said chafing-irons which abut against the follower-plate, a drum inclosing the s reader-blocks and the chafing-irons and a utting at one end against the followerplate, flanges integral with the forward ends of said spreader-blocks and normally abutting against the closed end of the drum, and a elioa'l spring interposed between the flanges of the chafing-irons and the flanges of Y the spreader-block's for resisting the telescopic, action of said chafing-irons and spreader blocks by being compressed longitudinally and forced into frictional engagement with the chafing-irons and the drum.

7 16. In a draft-rigging for cars, a plunger arranged to move longitudinally, spreaderblocks forming a pocket in which the rear end of said plunger is arranged, said plunger being adapted to spread said blocks apart and move them backwardly therewith a portion of its stroke, a follower-plate, chafingirons embracing the spreader-blocks and arranged to telescope thereon, flanges integral with the rear ends ofisaid chafing-irons which abut against said plate, a drum inclosing the spgreader-blocks and the chafing-irons and utting at one end against the followerplate, flanges integral with the forward ends of the spreader-blocks and normally abutting against the closed end'of the drum, a ring abutting against the flanges of the spreader-blocks, and a helical spring inter- 6 5 thechafing-irons to resist the telescopic action ofthe spreader-blocks and'the chafingirons by being compressed longitudinally, and forced into frictional engagement with the chafing-irons and the drums when the draft-rigging 1s under elther tractive or compressive force.

17. In a draft-rigging, a plunger arranged 'to move longitudinally, spreader blocks forming a pocket in which the rear end of said plunger is arranged, said plunger being adapted to spread said blocks apart and move them backwardly therewith a portion of its stroke, a follower-plate, chafing-irons enitraeing the spreader-blocks and arranged to telescope thereon, flanges integral with the against the follower-plate, a drum inclosing the spreader-blocks and the chafin irons and abutting at one end a ainst the f0 lower plate, flanges inte ral wit 1 the forwardends of the spreader-books and normally abutting against' the closed end of the drum, a helical spring interposed between'the flanges to resist the telescopic'action of the spreaderblocks and the chafing-irons being both b compressed and forced into fiictional en posed between said ring and-the flanges onrear ends of said chafing-irons which abut gagement' with the chafing-irons and the drum, and interlocking grooves and ribs for holding the chafing-irons and the spreaderblocks in longitudinal alinement.

18, In a tandem-spring friction draft-rigging, the combination-with a coupler, of a pair of draft-arms provided with oppositelydisposedpockets, the ends of which form front and rear stops, a front follower-plate normally abutting against'the' front stops, a

rear follower-plate normally abutting against the rear stops, a plunger projecting rear- Wardly from the front followerplate, a yoke attached to the coupler, a loop encircling the rear-portion of said yoke and the rear follower-plate, for moving the latter, forward, a drum abutting against said rear followerplate, a draft-spring abiitting against the front follower-plate and the drum for resisting either the backward movement of the former or the forward movement of the latter, spreader-blocks slidingly arran ed in the drum and forming a pocket in whic 1 the rear end of the plunger is arranged, themovement of said spreader-blocks being limited by the drum and the springs so they will be spread apart by the plunger when the draft-rigging is subjected to either compressive or tractive force, flanges on the front ends of said blocks,

and a helical spring'interposed between said flanges and the rear followenplatq which coacts with the draftspring in resisting the movements of the front follower-plate and the drum.

19. In a draft-rigging, a pair of draft-arms provided ygzithv oppositely-disposed pockets detachably secured to the draft-arms for su-pformmg front and rear stops, flanges closing porting said loop. one some of each pocket, front and rear fol- In testimony whereof I affix my signature lower-plates arranged to slide in said pockin the presence of two Witnesses.

5 e'ts resilient ineans for normally holding said EDWARD W. HARTOUGH. A

Witnesses:

FRANK A. STIOKLAND, WILLIAM M. WADLEY.

plates against their respective stops, a loop I encireling'the follower-plates and arranged between the draft-arms, and transverse strips 

